= DNS/EDNS/bufsize =
<<TableOfContents()>>

について、ここに記述してください。

== ルートゾーンKSKロールオーバー ==
影響 :  DNSSECを使っていなくても影響があるリゾルバー


== OARC ==

https://www.dns-oarc.net/oarc/services/replysizetest

 * If a resolver does not support the Extension Mechanisms for DNS (EDNS), replies are limited to 512 bytes.
 * The resolver may be behind a firewall that blocks IP fragments.
 * Some DNS-aware firewalls block responses larger than 512 bytes.

How To Use

{{{
$ dig +short rs.dns-oarc.net TXT

}}}

== ISC ==
https://www.dns-oarc.net/oarc/services/replysizetest

== 手元のBIND ==
{{{
$ dig +short rs.dns-oarc.net TXT
rst.x487.rs.dns-oarc.net.
rst.x461.x487.rs.dns-oarc.net.
rst.x466.x461.x487.rs.dns-oarc.net.
"Tested at 2018-11-27 00:00:35 UTC"
"sent EDNS buffer size 512"
"DNS reply size limit is at least 487"

}}}

== 手元のUnbound ==
{{{
$ dig +short rs.dns-oarc.net TXT @127.0.0.3
rst.x1188.rs.dns-oarc.net.
rst.x1198.x1188.rs.dns-oarc.net.
rst.x1169.x1198.x1188.rs.dns-oarc.net.
"DNS reply size limit is at least 1198"
"sent EDNS buffer size 1220"
"Tested at 2018-11-27 00:01:32 UTC"
}}}

== 手元のpdns-recursor ==
{{{
$ dig +short rs.dns-oarc.net TXT @127.0.0.2
rst.x1643.rs.dns-oarc.net.
rst.x1653.x1643.rs.dns-oarc.net.
rst.x1624.x1653.x1643.rs.dns-oarc.net.
"DNS reply size limit is at least 1653"
"Tested at 2018-11-27 00:03:36 UTC"
"sent EDNS buffer size 1680"
}}}

== 8.8.8.8 ==
{{{
$ dig +short rs.dns-oarc.net TXT @8.8.8.8
rst.x4090.rs.dns-oarc.net.
rst.x4058.x4090.rs.dns-oarc.net.
rst.x4064.x4058.x4090.rs.dns-oarc.net.
"173.194.171.13 DNS reply size limit is at least 4090"
"173.194.171.13 sent EDNS buffer size 4096"
"Tested at 2018-11-27 00:06:38 UTC"
}}}
== 9.9.9.9 ==
{{{
$ dig +short rs.dns-oarc.net TXT @9.9.9.9
rst.x1643.rs.dns-oarc.net.
rst.x1653.x1643.rs.dns-oarc.net.
rst.x1624.x1653.x1643.rs.dns-oarc.net.
"74.63.20.244 sent EDNS buffer size 1680"
"Tested at 2018-11-27 00:07:30 UTC"
"74.63.20.244 DNS reply size limit is at least 1653"
}}}

== 1.1.1.1 ==
{{{
$ dig +short rs.dns-oarc.net TXT @1.1.1.1
rst.x1433.rs.dns-oarc.net.
rst.x1408.x1433.rs.dns-oarc.net.
rst.x1414.x1408.x1433.rs.dns-oarc.net.
"Tested at 2018-11-27 00:08:33 UTC"
"108.162.227.251 sent EDNS buffer size 1452"
"108.162.227.251 DNS reply size limit is at least 1433"

}}}